HP elitedisplay e230t User Manual page 28

Table 3-1 Touch screen troubleshooting (continued)
Problem
When the monitor used is in a dual-screen configuration, the
touch function on the second display does not work.
Touch function is erratic.
22 Chapter 3 Operating the touch screen
Solution
The USB connection is only capable of operating a single-touch
screen monitor. If the second monitor is a touch monitor, you
must connect a second USB cable.
The screen may have surface contamination. Refer to
monitor on page 28 for detailed instructions.
Cleaning the